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A solid uniform spherical boulder rolls down the hill as shown in the figure(Figure 1) , starting from rest when it is H = 43.0{\rm m} above the bottom. The upper half of the hill is free of ice, so the boulder rolls without slipping. But the lower half is covered with perfectly smooth ice. Part A How fast is the boulder moving when it reaches the bottom of the hill? v = __________________m/s}
At what average rate does the force from the cable. A falling skydiver has a mass of 54.5 kg. What is the magnitude of the skydiver's acceleration when the upward force of air resistance has the magnitude that is equal to one-fourth of his weight.
The isotope 15N undergoes radioactive decay to form 15C. What charged particle is emitted in the decay process? how much kinetic energy in MeV is given to the particle
An elderly sailor is shipwrecked on a desert island, but manages to save his eyeglasses. What is the magnifying power of the telescope he can construct with these lenses
A loudspeaker diaphragm is producing a sound for 2.63s by moving back and forth in simple harmonic motion. How many times does the diaphragm move back and forth
A uniform plank of length 5.0 m and weight 211 N rests horizontally on two supports, with d = 1.17 m of the plank hanging over the right support. To what distance, x, could a person who weighs 412 N walk on the overhanging part of the plank before..
A merry-go-round at a playground is a circular platform that is mounted parallel to the ground and can rotate about an axis that is perpendicular to the platform at its center. What is the tangential speed of another child
William Tell is shooting at an apple that hangs on a tree. The apple is a horizontal distance of 20.0 m away and at a height of 4.00 m above the ground. what is the arrow's initial velocity
An ac generator with a frequency of 135Hz and an rms voltage of 20.5V is connected in series with a 11.0 kOhms resistor, What is the rms current in this circuit
What is the frequency of sound put out by the engine of a car moving at 90km/hr if its four-cylinder engine makes 2000 revolutions per kilometer
An air-track glider attached to a spring oscillates between the 10.0 {rm cm} mark and the 58.0 {rm cm} mark on the track. The glider completes 15.0 oscillations in 35.0 {rm s}. What are the (a) period, (b) frequency, (c) amplitude, and (d) highest..
Blood circulating from the heart to the hands and back to the heart travels a distance of about 1.9 m in 42 s. Find the average speed of the blood
A 130 horizontal beam is supported at each end. A 310 piano rests a quarter of the way from one end. What is the vertical force on each of the supports
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